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Heart|Lab Grown|IGI

1.51ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663660

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG846663660

Diamond specifications and retailer prices

From €733 EUR
£645 GBP
As of October 30, 2026
Save €2,704 EUR (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €3,437 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663660 or 846663660. Listed at 9 retailers as of October 30, 2026, with prices from €733 to €3,437, a €2,704 spread on the same certified stone. Brilliant Earth lists it at €3,437. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663660
Dimensions7.73 × 6.86 × 4.78 mm
L/W Ratio1.13
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.73 mm6.86 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663660
Side View
Table 57.0%Crown 36.1°Girdle: STK-THKPavilion 39.5°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €3,437 EUR|Low: €733 EUR|High: €4,332 EUR|Avg: €1,916 EUR|-20.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 3€733 EUR
Retailer 4€806 EUR
Retailer 7€1,045 EUR
Retailer 9€1,058 EUR
Retailer 2€1,716 EUR
Retailer 6€2,566 EUR
Retailer 5€2,738 EUR
Retailer 8€2,854 EUR
Brilliant Earth€3,437 EUR

6 data points across 9 retailers

9 retailers€733 EUR to €3,437 EUR

A
Cheapest Retailer
-
€733 EUR
£645 GBP
A
Retailer 2
-
€806 EUR
$900 USD
View
B+
Retailer 3
-
€1,045 EUR
$1,167 USD
View
B+
Retailer 4
-
€1,058 EUR
$1,182 USD
View
B+
Retailer 5
-
€1,716 EUR
$1,917 USD
View
B
Retailer 6
-
€2,566 EUR
$2,867 USD
View
B
Retailer 7
-
€2,738 EUR
£2,409 GBP
View
B
Retailer 8
-
€2,854 EUR
$3,189 USD
View
Most Expensive
B
Brilliant Earth
22319408A · Oct 31
€3,437 EUR
$3,840 USD
View
8 more retailers have this diamond
Prices start from €733 EURSave up to €2,704 EUR

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Heart
€733 EUR